20 viscosities · 50–1000 cSt

Silicone Performance Fluid

Our bestselling shock oil. Twenty weights from 50 cSt up to 1000 cSt, in 50 cSt steps. 100% silicone base, heat-stable, seal-safe.

Why it works

The next bottle behaves like the last one.

The annoying thing about a lot of generic shock oils is that batch-to-batch variance is real. The 400 cSt you bought last month might read more like 380 cSt this month, and setup work doesn't really survive that.

Rhodex Silicone Performance Fluid is made to spec, batch after batch. Pure silicone — no PAO, no mineral oil thinners, no thickener additives. What's on the label is what's in the bottle, and what's in the next bottle.

That's the point. Repeatable setup work. Notes from last race still apply when you fill the shocks for the next one. The bottle does what it says, every time.

Rhodex Silicone Performance Fluid
Complete Range

Every Viscosity. Every Setup.

From 50 cSt cold-start rebound oil to 1000 cSt heavy damping for high-grip carpet — find your exact specification.

Filter:
Rhodex 50 cSt Shock Oil

Silicone Performance Fluid

50 cSt · Ultra-Light

Cold-weather tuning, light rebound damping, and ultra-fast shock response. The lightest in the range.

Rhodex 100 cSt Shock Oil

Silicone Performance Fluid

100 cSt · Light

Light damping for fast tracks and small-scale RC. Perfect blending base for custom setups.

Rhodex 150 cSt Shock Oil

Silicone Performance Fluid

150 cSt · 15WT

Light-medium damping. Common viscosity for indoor carpet and high-grip surface tuning.

Rhodex 200 cSt Shock Oil

Silicone Performance Fluid

200 cSt · 20WT

Light damping fluid. Popular for touring cars on smooth tracks and balanced suspension setups.

Rhodex 250 cSt Shock Oil

Silicone Performance Fluid

250 cSt · 25WT

Mid-light damping. Versatile choice for off-road buggies and smaller RC platforms.

Rhodex 300 cSt Shock Oil

Silicone Performance Fluid

300 cSt · 30WT

Standard medium-light damping. Excellent all-around viscosity for mid-grip surfaces.

Rhodex 350 cSt Shock Oil

Silicone Performance Fluid

350 cSt · 35WT

Medium damping. The "sweet spot" viscosity used by countless racers as their default setup oil.

Rhodex 400 cSt Shock Oil

Silicone Performance Fluid

400 cSt · 40WT

Medium damping. Reliable middle-range viscosity for off-road racing and bumpy tracks.

Rhodex 450 cSt Shock Oil

Silicone Performance Fluid

450 cSt · 45WT

Medium-firm damping. Popular for short-course trucks and aggressive off-road driving styles.

Rhodex 500 cSt Shock Oil

Silicone Performance Fluid

500 cSt · 50WT

Firm damping. Standard choice for 1/8 buggies and trucks on rough or jumpy tracks.

Rhodex 550 cSt Shock Oil

Silicone Performance Fluid

550 cSt · 55WT

Firm damping. Higher control for technical tracks with sharp transitions and jumps.

Rhodex 600 cSt Shock Oil

Silicone Performance Fluid

600 cSt · 60WT

Firm-heavy damping. For aggressive off-road and large-scale RC platforms requiring stiff control.

Rhodex 650 cSt Shock Oil

Silicone Performance Fluid

650 cSt · 65WT

Heavy damping. For high-grip surfaces requiring tight body roll control.

Rhodex 700 cSt Shock Oil

Silicone Performance Fluid

700 cSt · 70WT

Heavy damping for monster trucks, large-scale RC, and high-load applications.

Rhodex 750 cSt Shock Oil

Silicone Performance Fluid

750 cSt · 75WT

Very heavy damping. Specialty viscosity for crawler shocks and ultra-controlled compression.

Rhodex 800 cSt Shock Oil

Silicone Performance Fluid

800 cSt · 80WT

Very heavy damping. For extreme high-grip carpet and ultra-stiff rebound control.

Rhodex 850 cSt Shock Oil

Silicone Performance Fluid

850 cSt · 85WT

Extra-heavy damping. Specialist viscosity for niche applications and extreme suspension setups.

Rhodex 900 cSt Shock Oil

Silicone Performance Fluid

900 cSt · 90WT

Extra-heavy damping. For high-load racing, controlled compression, and stiff suspension behavior.

Rhodex 950 cSt Shock Oil

Silicone Performance Fluid

950 cSt · 95WT

Ultra-heavy damping. Specialist viscosity for unique suspension setups and high-control applications.

Rhodex 1000 cSt Shock Oil

Silicone Performance Fluid

1000 cSt · 100WT

Maximum damping. Top of the range for the heaviest setups and most demanding compression control needs.

RC buggy suspension with shocks
Where the bottle lives

Every shock, every fill, every race.

The shock body is where the oil earns its keep. Heat builds, the piston cycles, and the damping curve has to stay where you put it from lap one to the last corner.

What's in the bottle

The same base across the range.

Every bottle in the Silicone Performance Fluid line uses the same base chemistry. The only thing that changes is the viscosity.

100% silicone

Pure polydimethylsiloxane. No PAO blends, no mineral oil thinners, no thickener additives. The viscosity behaves the way silicone is supposed to.

Holds under heat

Stabilised against thermal thinning. The 400 cSt at the start of the run is close to 400 cSt at the end.

Seal-safe

Won't swell or attack standard shock O-rings and seals. Compatible with all the usual shock body materials.

50 cSt steps

The range covers 50, 100, 150… all the way to 1000 cSt. Step up or down to the next bottle — no need to blend two together.

60 ml bottle

Squeeze bottle with a fine dropper tip — clean to dispense, easy to bleed.

Made in the UK

Formulated and bottled in Britain. End-to-end QC.

Get the bottle you need

The full lineup is at Lubricants Hub.

All 20 viscosities, in stock.